Electrical Machines In synchronous motor the torque is proportional to 1/P² P² Power P 1/P 1/P² P² Power P 1/P ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ratio of starting torque to full load torque is minimum in Differential compound motor. Series motor. Cumulative compound motor. Shunt motor. Differential compound motor. Series motor. Cumulative compound motor. Shunt motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When Flemings right hand rule to find the direction of induced emf, the thumb points towards direction of flux. direction of motion of the conductor. opposite to the direction of motion of the conductor. direction of induced emf. direction of flux. direction of motion of the conductor. opposite to the direction of motion of the conductor. direction of induced emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following factors improve commutation in a dc machine ? 1. High contact resistance of brushes 2. High inductance of the coils undergoing commutation 3. Shifting of brushes in the direction of rotation for a generator and in the opposite direction For a motor 4. Narrow width for the commutation bars Select the correct answer using the codes given below : Codes : 1, 2 and 4 2, 3 and 4 1 and 3 1, 2, and 3 1, 2 and 4 2, 3 and 4 1 and 3 1, 2, and 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC shunt motor if load is increased, the speed increased slightly. remains constant. reduce slightly. increase proportional. increased slightly. remains constant. reduce slightly. increase proportional. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The torque angle, in a synchronous motor, is the angle between the supply voltage and the back emf. magnetizing electric current and back emf. the rotating stator flux and rotor flux. None of these the supply voltage and the back emf. magnetizing electric current and back emf. the rotating stator flux and rotor flux. None of these ANSWER DOWNLOAD EXAMIANS APP
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